So I am running into a weird issue. I am trying to build an annotated reference genome with STAR, except I can never get passed the "sorting Suffix Array chunks and saving them to disk" portion before it displays "KILLED" and exits out of the command. At first I thought I the issue was that I was doing other things in parallel on the machine, and therefore eating up the RAM, so I proceeded to close everything on Windows except my virtual machine and run it again. But again the same vague message of "KILLED" displayed after ~1 hour of run time. Any idea what is going on here?
Intel i5 4690k
32 GB DDR3 RAM
Windows 7 Ultimate, running Umbuntu in a VirtualBox
STAR --runThreadN 8 --runMode genomeGenerate --genomeDir /home/peter/Documents/Files/Reference --genomeFastaFiles /home/peter/Documents/Files/Rattus_norvegicus/NCBI/Rnor_6.0/Sequence/WholeGenomeFasta/genome.fa --sjdbGTFfile /home/peter/Documents/Files/Rattus_norvegicus/NCBI/Rnor_6.0/Annotation/Archives/archive-current/Genes/genes.gtf --sjdbOverhang 100